Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent
1999-05-12
2000-05-02
Riley, Shawn
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
318811, 363 39, H02M 112
Patent
active
060580283
ABSTRACT:
A DC matrix converter having six forward current conducting power switches and six reverse current conducting power switches has the on time duration of each power switch within a pulse width modulation period controlled by relationships between d and q components of a modulation index determined by the ratio of a voltage command to the instantaneous voltage of the AC mains expressed in stationary dq coordinates, the selection of which is made based on inequalities between the DC main voltage components expressed in stationary dq coordinates. Switch selection is also performed in response to relationships of the AC main voltage components expressed in stationary dq coordinates. Zero vectors are selected to minimize the common mode voltage.
REFERENCES:
patent: 5541827 (1996-07-01), Allfather
D.G. Holmes, T. A. Lipo: Implementation of a Controlled Rectifier Using AC-AC Matrix Converter Theory, IEEE Transactions on Power Electronics, vol. 7, No. 1 , Jan. 1992, pp. 240-250.
D. Casadei, G. Grandi. G. Serra, A. Tani: Space Vector Control of Matrix Converters With Unity Input Power Factor and Sinusoidal Input/Output Waveforms, EPE '93, Brighton, Sep. 13-16, 1993, pp. 170-175.
L. Huber, D. Borojevic: Space Vector Modulated Three-Phase to Three-Phase Matrix Converter with Input Power Factor Correction, IEEE Transactions on Industry Applications, vol. 31, No. 6, Nov./Dec. 1995, pp. 1234-1246.
Otis Elevator Company
Riley Shawn
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